This KB article assumes that an organisation account has been created
in Proofpoint Essentials, and a privileged user account exists and is
being used to manage this organisation. If you have a question related
to POP or IMAP, please see the knowledge bas...

SPECIAL NOTE:
*Use only the data center that was assigned to your company. Failure
to use the correct data center will result in LOST MAIL due to
rejections.
*Please ensure you add our IPs to your firewall's white list. If your
firewall runs a blackli...

This rule is designed to quarantine external inbound message that
appear to come from your organization. This tool will only work if you
deliver your internal e-mail from your domain locally. If you receive
e-mail from an external source using your domain...